docs: def get_default_backend_config(appdirs):
      """
      Return a default config dictionary.
  
      Args:
          appdirs (HamsterAppDirs): ``HamsterAppDirs`` instance encapsulating the apps details.
  
      Returns:
          dict: Dictionary with a default configuration.
  
      Note:
          Those defaults are independent of the particular config-store.
      """
      return {
          'store': 'sqlalchemy',
          'day_start': datetime.time(5, 30, 0),
          'fact_min_delta': 1,
          'tmpfile_path': os.path.join(appdirs.user_data_dir, '{}.tmp'.format(appdirs.appname)),
          'db_engine': 'sqlite',
          'db_path': os.path.join(appdirs.user_data_dir, '{}.sqlite'.format(appdirs.appname)),
      }